Manufactured using a combination of steel and aluminum, known as Steloy, Hiatt's lightweight hinge-style handcuff Models 3154 and 3155 are 40-percent lighter and 17-percent larger than standard handcuffs, providing maximum strength without the extra weight. Both hinged models provide a greater level of suspect control by using three solid links rather than roller chains to connect the cuffs. The Model 3154 is available in nickel-plate finish while the Model 3155 is available in black finish.